(Note: (*) are deprecated and thus were removed from the repos [http://www.archlinux.org/news/333/])

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* xf86-input-penmount (*)

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(Note: (*) are deprecated and thus were removed from the repos [https://www.archlinux.org/news/333/])

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Some for some devices proprietary drivers exists as well, as e.g. {{AUR|xf86-input-egalax}} but it's recommended to try the open source drivers first.

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Proprietary drivers exist for some devices (e.g.: {{AUR|xf86-input-egalax}}), but it's recommended to try the open source drivers first.

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Depending on your touchscreen device choose an appropriated driver.

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Depending on your touchscreen device choose an appropriate driver.

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The evtouch input drivers support a wide variety of touchscreens from different vendors like Fujitsu, eGalax, IDEACO, ITM, Touchkit.

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The evtouch input drivers support a wide variety of touchscreens from different vendors like Fujitsu, eGalax, IDEACO, ITM, and Touchkit.

{{Box YELLOW||Since I've only got one touchscreen device (USB 0eef:0001 D-WAV Scientific Co., Ltd eGalax TouchScreen) which works with the evtouch driver I confine myself to this driver. Perhaps someone can add details about how to set up other drivers.}}

{{Box YELLOW||Since I've only got one touchscreen device (USB 0eef:0001 D-WAV Scientific Co., Ltd eGalax TouchScreen) which works with the evtouch driver I confine myself to this driver. Perhaps someone can add details about how to set up other drivers.}}

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For touchscreen calibration the {{AUR|xf86-input-evtouch}} package includes a calibration program.

For touchscreen calibration the {{AUR|xf86-input-evtouch}} package includes a calibration program.

sudo /usr/lib/xf86-input-evtouch/calibrate.sh

sudo /usr/lib/xf86-input-evtouch/calibrate.sh

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No matter whether you started it from TTY or X11, this will start a new X server and bring up a white screen. Move the pen around the display border, along all edges a view times to get the minimum and maximum coordinates. Press {{Keypress|Return}}. Then tab exactly on the red cross. The next cross will turn red, touch it again and repeat this procedure for all crosses.

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No matter whether you started it from TTY or X11, this will start a new X server and bring up a white screen. Move the pen around the display border, along all edges a view times to get the minimum and maximum coordinates. Press {{ic|Return}}. Then tab exactly on the red cross. The next cross will turn red, touch it again and repeat this procedure for all crosses.

When your done you should return to command line. The calibration data was written to {{ic|/etc/evtouch/config}}.

When your done you should return to command line. The calibration data was written to {{ic|/etc/evtouch/config}}.

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== Using a touchscreen in a multi-head setup ==

== Using a touchscreen in a multi-head setup ==

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To use multiple displays (some of which are touchscreens), you need to tell Xorg the mapping between the touch surface and the screen. This can be done using {{Ic|xinput}} to set the touchscreen's coordinate transformation matrix, as described [http://www.x.org/wiki/XInputCoordinateTransformationMatrixUsage in the X.Org Wiki].

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To use multiple displays (some of which are touchscreens), you need to tell Xorg the mapping between the touch surface and the screen.

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For a detailed guide, see [[Calibrating_Touchscreen]]

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This can be done very easily with xinput:

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Take for example the setup of having a wacom tablet and an external monitor. When we type xrandr we get a list of our two displays:

You see we have two displays here. LVDS1 and VGA1. LVDS1 is the display internal to the tablet, and VGA1 is the external monitor. We wish to map our stylus input to LVDS1. So we have to find the ID of the stylus input:

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{{bc|

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$ xinput --list

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⎡ Virtual core pointer id&#61;2 [master pointer (3)]

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⎜ ↳ Virtual core XTEST pointer id&#61;4 [slave pointer (2)]

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⎜ ↳ QUANTA OpticalTouchScreen id&#61;9 [slave pointer (2)]

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⎜ ↳ TPPS/2 IBM TrackPoint id&#61;11 [slave pointer (2)]

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⎜ ↳ Serial Wacom Tablet WACf004 stylus id&#61;13 [slave pointer (2)]

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⎜ ↳ Serial Wacom Tablet WACf004 eraser id&#61;14 [slave pointer (2)]

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⎣ Virtual core keyboard id&#61;3 [master keyboard (2)]

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↳ Virtual core XTEST keyboard id&#61;5 [slave keyboard (3)]

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↳ Power Button id&#61;6 [slave keyboard (3)]

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↳ Video Bus id&#61;7 [slave keyboard (3)]

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↳ Sleep Button id&#61;8 [slave keyboard (3)]

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↳ AT Translated Set 2 keyboard id&#61;10 [slave keyboard (3)]

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↳ ThinkPad Extra Buttons id&#61;12 [slave keyboard (3)]

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}}

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We see that we have two stylus inputs who's ID's are 13 and 14. We now need to simply map our inputs to our output like so:

Revision as of 10:48, 1 September 2013

Notes:please use the second argument of the template to provide more detailed indications. (Discuss in Talk:Touchscreen#)

This article or section is out of date.

Reason:please use the first argument of the template to provide a brief explanation. (Discuss in Talk:Touchscreen#)

If you ever tried to set up a touchscreen device in linux, you might have noticed that it's either working out of the box (besides some calibration) or is very tedious, especially when it isn't supported by the kernel.

evtouch drivers

This package already includes a set of udev rules to create a permanent node for your input device in /etc/udev/rules.d/69-touchscreen.rules.

If everything worked fine so far, you should have a symlink /dev/input/evtouch_event to your input device. If not, your touch device might not work with evtouch, but you can add a custom udev rule for your device and try it anyway.

In case you configured X server to use HAL hot-plugging, the touchscreen should work now after restarting the X server.
Else you have to add the corresponding "InputDevice" section to xorg.conf as described on evtouch's webside.

Calibration

It's assumed that you have the touchscreen working now in X11 and that you're using hot-plugging for configuration. If you manually set up your input devices and thus switched off hot-plugging, you have to add the X11 options of this section to the xorg.conf file instead (see evtouch's webside for details again).

Rough calibration

For touchscreen calibration the xf86-input-evtouchAUR package includes a calibration program.

sudo /usr/lib/xf86-input-evtouch/calibrate.sh

No matter whether you started it from TTY or X11, this will start a new X server and bring up a white screen. Move the pen around the display border, along all edges a view times to get the minimum and maximum coordinates. Press Return. Then tab exactly on the red cross. The next cross will turn red, touch it again and repeat this procedure for all crosses.
When your done you should return to command line. The calibration data was written to /etc/evtouch/config.

To restore the calibration data after booting add evtouch_config to the DAEMONS variable in /etc/rc.conf

DAEMONS=( ... evtouch_config ... )

This will read the calibration data from /etc/evtouch/config and set the corresponding X options using HAL.

You can now (re)start your X server and enjoy your calibrated touchscreen.

Fine calibration (optional)

If your not satisfied with the calibration you can do further tweaking by changing the values in /etc/evtouch/config manually.
MINX, MINY, MAXX, MAXY are the minimal and maximal coordinates and the nine X?,Y? pairs are the coordinates of the calibration points in the order you touched them.

Correct orientation of the coordinate system

The 9 point calibration assures that the coordinate axis are orientated in a way that your cursor moves to the right when your pen does (due to the signs of the X,Y pairs). In case you nevertheless notice your cursor is moving in the wrong direction you can add

hal_set swapx 1
hal_set swapy 1

to /etc/rc.d/evtouch_config (of course this will get overwritten when you upgrade the package)

When X and Y axis are swaped and your touchscreen uses the usbtouchscreen kernel module you can add the following line to /etc/modprobe.d/modprobe.conf

options usbtouchscreen swap_xy=1

Correct orientation can also be done using scripts which utilize xrandr and xinput.
This was used and tested on a thinkpad x220t.
A shell script to make the rotation (portrait view) and fix the coordinate system for the touch screen would be

Make the calibration persistent to unplugging or suspending

You may notice that after unplugging the touch device and replugging it while the X server is running, your calibration is messed up. The same happens when you resume from hibernation or suspend.

The reason is, that your calibration setting get set only once, at boot time by evtouch_config. When you unplug it the settings are removed when evtouch is unloaded.
On plugging it in HAL sets the default settings as specified in /usr/share/hal/fdi/policy/20thirdparty/50-....fdi and loads the evtouch driver, which reads the calibration settings into its memory. Therefore it doesn't work to simply call evtouch_config while the X window system is running.

The only way I found to make the calibration settings survive a replug-in or a hibernation is to set them directly in the HAL policy file.
The following command converts the calibration settings to HAL policy format and prints the result on stdout.

You see we have two displays here. LVDS1 and VGA1. LVDS1 is the display internal to the tablet, and VGA1 is the external monitor. We wish to map our stylus input to LVDS1. So we have to find the ID of the stylus input: